:root {
  --bg: #f3f6f9;
  --surface: #ffffff;
  --fg: #172331;
  --muted: #637181;
  --border: #d8e1ea;
  --accent: #005598;
  --accent-soft: #e4f1fc;
  --action: #ffda44;
  --success: #16784b;
  --success-soft: #e5f6ee;
  --warning: #9a5a00;
  --warning-soft: #fff4db;
  --danger: #a53030;
  --danger-soft: #fdeaea;
  --shadow: rgba(18, 35, 52, 0.12);
  --font-display: "Segoe UI", system-ui, sans-serif;
  --font-body: "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, monospace;
  --radius: 10px;
  --radius-lg: 16px;
  --container: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { min-width: 320px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { text-wrap: pretty; }
h1, h2, h3 { margin-top: 0; font-family: var(--font-display); }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.admin-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in oklch, var(--surface) 94%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.admin-header-inner {
  width: min(100% - 32px, var(--container));
  min-height: 68px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.admin-brand { display: flex; align-items: center; gap: 12px; }
.admin-brand img { width: 178px; }
.admin-brand span {
  padding-left: 12px;
  border-left: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.header-actions { display: flex; align-items: center; gap: 10px; }
.user-email { color: var(--muted); font-size: 13px; }

.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}
.page {
  padding-block: clamp(28px, 5vw, 56px);
}
.page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.page-heading h1 {
  margin-bottom: 6px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.025em;
}
.lead { margin: 0; color: var(--muted); max-width: 62ch; font-size: 16px; }

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: 0 8px 28px var(--shadow);
}
.card-section { padding: 26px; }
.card-section + .card-section { border-top: 1px solid var(--border); }
.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}
.section-heading h2 { margin-bottom: 3px; font-size: 20px; }
.section-heading p { margin: 0; color: var(--muted); font-size: 13px; }

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field-wide { grid-column: 1 / -1; }
.field label { color: var(--fg); font-size: 13px; font-weight: 700; }
.field-hint { color: var(--muted); font-size: 12px; }
.control {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--fg);
}
.control:hover { border-color: var(--muted); }
.control:focus-visible,
.btn:focus-visible,
.check-card:focus-within {
  outline: 3px solid color-mix(in oklch, var(--action) 74%, transparent);
  outline-offset: 2px;
}
textarea.control { min-height: 96px; resize: vertical; }
input[type="file"].control { padding: 9px; }

.btn {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--fg);
  font-weight: 750;
  transition: transform 100ms ease, border-color 140ms ease, background-color 140ms ease;
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn-primary { border-color: var(--accent); background: var(--accent); color: var(--surface); }
.btn-primary:hover { background: color-mix(in oklch, var(--accent) 88%, black); }
.btn-action { border-color: var(--action); background: var(--action); color: var(--accent); }
.btn-ghost { border-color: transparent; background: transparent; color: var(--accent); }
.btn-danger { color: var(--danger); }
.btn:disabled { cursor: not-allowed; opacity: 0.54; }

.checkbox-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.check-card {
  display: flex;
  min-height: 48px;
  align-items: center;
  gap: 9px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 13px;
  font-weight: 650;
}
.check-card:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.check-card input { width: 17px; height: 17px; accent-color: var(--accent); }

.repeat-list { display: flex; flex-direction: column; gap: 10px; }
.repeat-row {
  display: grid;
  grid-template-columns: 1fr 150px auto;
  gap: 10px;
  align-items: end;
}
.form-actions {
  position: sticky;
  bottom: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: color-mix(in oklch, var(--surface) 95%, transparent);
  box-shadow: 0 -8px 24px var(--shadow);
  backdrop-filter: blur(12px);
}
.action-group { display: flex; gap: 10px; }
.form-status { min-height: 20px; color: var(--muted); font-size: 13px; }
.form-status.error { color: var(--danger); }
.form-status.success { color: var(--success); }

.login-page {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(420px, 0.85fr);
}
.login-visual {
  position: relative;
  display: flex;
  min-height: 100svh;
  align-items: flex-end;
  padding: clamp(32px, 6vw, 80px);
  overflow: hidden;
  background: var(--accent) url("background_image_sin_logo.png") center / cover no-repeat;
}
.login-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 45, 80, 0.18), rgba(0, 35, 64, 0.82));
}
.login-brandmark {
  position: absolute;
  top: clamp(24px, 6vh, 54px);
  left: 50%;
  z-index: 2;
  width: min(72%, 360px);
  padding: 14px 20px;
  transform: translateX(-50%);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 10px 28px rgba(0, 20, 38, 0.22);
}
.login-brandmark img { width: 100%; height: auto; }
.login-message { position: relative; z-index: 1; max-width: 560px; color: var(--surface); }
.login-message img { width: 220px; margin-bottom: 28px; }
.login-message h1 { margin-bottom: 14px; font-size: clamp(36px, 6vw, 68px); line-height: 1.02; letter-spacing: -0.035em; }
.login-message p { margin: 0; max-width: 46ch; color: color-mix(in oklch, var(--surface) 78%, transparent); font-size: 17px; }
.login-panel {
  display: grid;
  place-items: center;
  padding: 32px;
  background: var(--surface);
}
.login-box { width: min(100%, 420px); }
.login-box h2 { margin-bottom: 8px; font-size: 30px; }
.login-box > p { margin: 0 0 28px; color: var(--muted); }
.login-form { display: flex; flex-direction: column; gap: 18px; }
.login-note {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
}

.dashboard-grid { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.7fr); gap: 20px; }
.race-card { overflow: hidden; }
.race-card-top {
  min-height: 150px;
  display: flex;
  align-items: flex-end;
  padding: 24px;
  background: linear-gradient(135deg, var(--accent), color-mix(in oklch, var(--accent) 72%, black));
  color: var(--surface);
}
.race-card-top h2 { margin: 0 0 4px; font-size: 28px; }
.race-card-top p { margin: 0; color: color-mix(in oklch, var(--surface) 76%, transparent); }
.race-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.meta-item { padding: 18px; border-right: 1px solid var(--border); }
.meta-item:last-child { border-right: 0; }
.meta-item span { display: block; color: var(--muted); font-size: 11px; font-weight: 700; text-transform: uppercase; }
.meta-item strong { display: block; margin-top: 4px; }
.quick-actions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; padding: 18px; border-top: 1px solid var(--border); }
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--warning-soft);
  color: var(--warning);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}
.status-badge.published { background: var(--success-soft); color: var(--success); }
.side-list { display: flex; flex-direction: column; }
.side-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
}
.side-item:last-child { border-bottom: 0; }
.side-item span { color: var(--muted); font-size: 13px; }
.side-item strong { font-family: var(--font-mono); }

@media (max-width: 860px) {
  .login-page { grid-template-columns: 1fr; }
  .login-visual { min-height: 34svh; padding: 32px; }
  .login-message h1 { font-size: 38px; }
  .login-message p { display: none; }
  .login-message img { width: 174px; margin-bottom: 16px; }
  .login-panel { min-height: 66svh; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .checkbox-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 580px) {
  .admin-header-inner,
  .container { width: min(100% - 20px, var(--container)); }
  .admin-brand img { width: 118px; }
  .admin-brand span,
  .user-email { display: none; }
  .page-heading { align-items: flex-start; flex-direction: column; }
  .grid-2,
  .grid-3,
  .checkbox-grid { grid-template-columns: 1fr; }
  .repeat-row { grid-template-columns: 1fr 110px auto; }
  .card-section { padding: 20px; }
  .form-actions { align-items: stretch; flex-direction: column; }
  .action-group { width: 100%; }
  .action-group .btn { flex: 1; }
  .login-visual { min-height: 30svh; }
  .login-panel { min-height: 70svh; padding: 26px 20px; align-items: start; }
  .race-meta { grid-template-columns: 1fr; }
  .meta-item { border-right: 0; border-bottom: 1px solid var(--border); }
  .meta-item:last-child { border-bottom: 0; }
  .quick-actions { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}